[ 
https://issues.apache.org/jira/browse/HDFS-7037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14314980#comment-14314980
 ] 

Yongjun Zhang commented on HDFS-7037:
-------------------------------------

HI [~wheat9],

Would you please clarify your earlier comment at 
https://issues.apache.org/jira/browse/HDFS-7037?focusedCommentId=14286085&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14286085

Did you mean you disagree with HDFS-6776 solution?

I'm confused because I thought the result of the extensive discussion in 
HDFS-6776 is:

* HDFS-6776 solution is agreed
* my patch for HDFS-7036 is not yet agreed

BTW, I have some long standing questions for you in HDFS-7036. I'd appreciate 
if you could help answering them.

Thanks.



> Using distcp to copy data from insecure to secure cluster via hftp doesn't 
> work  (branch-2 only)
> ------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-7037
>                 URL: https://issues.apache.org/jira/browse/HDFS-7037
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: security, tools
>    Affects Versions: 2.6.0
>            Reporter: Yongjun Zhang
>            Assignee: Yongjun Zhang
>         Attachments: HDFS-7037.001.patch
>
>
> This is a branch-2 only issue since hftp is only supported there. 
> Issuing "distcp hftp://<insecureCluster> hdfs://<secureCluster>" gave the 
> following failure exception:
> {code}
> 14/09/13 22:07:40 INFO tools.DelegationTokenFetcher: Error when dealing 
> remote token:
> java.io.IOException: Error when dealing remote token: Internal Server Error
>       at 
> org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.run(DelegationTokenFetcher.java:375)
>       at 
> org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.getDTfromRemote(DelegationTokenFetcher.java:238)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem$2.run(HftpFileSystem.java:252)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem$2.run(HftpFileSystem.java:247)
>       at java.security.AccessController.doPrivileged(Native Method)
>       at javax.security.auth.Subject.doAs(Subject.java:415)
>       at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1554)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem.getDelegationToken(HftpFileSystem.java:247)
>       at 
> org.apache.hadoop.hdfs.web.TokenAspect.ensureTokenInitialized(TokenAspect.java:140)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem.addDelegationTokenParam(HftpFileSystem.java:337)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem.openConnection(HftpFileSystem.java:324)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem$LsParser.fetchList(HftpFileSystem.java:457)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem$LsParser.getFileStatus(HftpFileSystem.java:472)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem.getFileStatus(HftpFileSystem.java:501)
>       at org.apache.hadoop.fs.Globber.getFileStatus(Globber.java:57)
>       at org.apache.hadoop.fs.Globber.glob(Globber.java:248)
>       at org.apache.hadoop.fs.FileSystem.globStatus(FileSystem.java:1623)
>       at 
> org.apache.hadoop.tools.GlobbedCopyListing.doBuildListing(GlobbedCopyListing.java:77)
>       at org.apache.hadoop.tools.CopyListing.buildListing(CopyListing.java:81)
>       at 
> org.apache.hadoop.tools.DistCp.createInputFileListing(DistCp.java:342)
>       at org.apache.hadoop.tools.DistCp.execute(DistCp.java:154)
>       at org.apache.hadoop.tools.DistCp.run(DistCp.java:121)
>       at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
>       at org.apache.hadoop.tools.DistCp.main(DistCp.java:390)
> 14/09/13 22:07:40 WARN security.UserGroupInformation: 
> PriviledgedActionException as:[email protected] (auth:KERBEROS) 
> cause:java.io.IOException: Unable to obtain remote token
> 14/09/13 22:07:40 ERROR tools.DistCp: Exception encountered 
> java.io.IOException: Unable to obtain remote token
>       at 
> org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.getDTfromRemote(DelegationTokenFetcher.java:249)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem$2.run(HftpFileSystem.java:252)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem$2.run(HftpFileSystem.java:247)
>       at java.security.AccessController.doPrivileged(Native Method)
>       at javax.security.auth.Subject.doAs(Subject.java:415)
>       at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1554)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem.getDelegationToken(HftpFileSystem.java:247)
>       at 
> org.apache.hadoop.hdfs.web.TokenAspect.ensureTokenInitialized(TokenAspect.java:140)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem.addDelegationTokenParam(HftpFileSystem.java:337)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem.openConnection(HftpFileSystem.java:324)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem$LsParser.fetchList(HftpFileSystem.java:457)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem$LsParser.getFileStatus(HftpFileSystem.java:472)
>       at 
> org.apache.hadoop.hdfs.web.HftpFileSystem.getFileStatus(HftpFileSystem.java:501)
>       at org.apache.hadoop.fs.Globber.getFileStatus(Globber.java:57)
>       at org.apache.hadoop.fs.Globber.glob(Globber.java:248)
>       at org.apache.hadoop.fs.FileSystem.globStatus(FileSystem.java:1623)
>       at 
> org.apache.hadoop.tools.GlobbedCopyListing.doBuildListing(GlobbedCopyListing.java:77)
>       at org.apache.hadoop.tools.CopyListing.buildListing(CopyListing.java:81)
>       at 
> org.apache.hadoop.tools.DistCp.createInputFileListing(DistCp.java:342)
>       at org.apache.hadoop.tools.DistCp.execute(DistCp.java:154)
>       at org.apache.hadoop.tools.DistCp.run(DistCp.java:121)
>       at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
>       at org.apache.hadoop.tools.DistCp.main(DistCp.java:390)
> Caused by: java.io.IOException: Error when dealing remote token: Internal 
> Server Error
>       at 
> org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.run(DelegationTokenFetcher.java:375)
>       at 
> org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.getDTfromRemote(DelegationTokenFetcher.java:238)
>       ... 22 more
> {code}



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